Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jan Chaloupka, Jan BlazekfiledCriticalJan Chaloupka
Priority to CS85775ApriorityCriticalpatent/CS178581B1/cs
Publication of CS178581B1publicationCriticalpatent/CS178581B1/cs